A friend of mine bought a race car and a trailer to haul it. The ramps were double thickness 2x12 with cleats and threaded rod in one end to connect to the trailer. The ramps were turned around and slid into the back of the trailer with the threaded rod sitting in the holes. He didn't have a hitch on his pickup to pull it so he asked me to pull it to his in-laws house which was about 20 miles away. When we got there, he went to pull the ramps out and they were gone. He said, "I wonder where they fell out". I said I didn't want to know. We had driven 15 miles on Interstate 90 in the dark.